# -- coding: utf-8 --
# @Time : 2021/3/15--19:53
# @Author : ChinaV
# @File : 简单应用题 2：计算向量积.py

# 请在、、、、补充若干行代码，完成向量积运算
ls = [111, 222, 333, 444, 555, 666, 777, 888, 999]
lt = [999, 777, 555, 333, 111, 888, 666, 444, 222]
s = 0
for i in range(len(ls)):
    s += lt[i] * ls[i]
print(s)
